US4287108A - Mixtures of polypropylene and liquid saturated diorganopolysiloxanes - Google Patents

Mixtures of polypropylene and liquid saturated diorganopolysiloxanes Download PDF

Info

Publication number
US4287108A
US4287108A US06/119,940 US11994080A US4287108A US 4287108 A US4287108 A US 4287108A US 11994080 A US11994080 A US 11994080A US 4287108 A US4287108 A US 4287108A
Authority
US
United States
Prior art keywords
polypropylene
weight
diorganopolysiloxane
mixtures
thermoplastic mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/119,940
Inventor
Ulrich Grigo
Leo Morbitzer
Klaus-Peter Arlt
Rudolf Binsack
Josef Merten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Application granted granted Critical
Publication of US4287108A publication Critical patent/US4287108A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04Polysiloxanes

Definitions

  • the present invention relates to homogeneous, thermoplastic mixtures of isotactic polypropylene and liquid, saturated diorganopolysiloxanes which siloxanes have viscosity within a certain range.
  • liquid saturated diorganopolysiloxane having a viscosity in the range of from 30,000 to 80,000 cSt at 20° C. have a lasting effect on the mechanical properties of isotactic polypropylene even when added in only small quantities.
  • the elastic properties of moulded articles produced from the polypropylene/diorganopolysiloxane mixtures of the present invention are substantially improved by the addition of small quantities of diorganopolysiloxane while their dimensional stability under heat and their rigidity are largely preserved.
  • the permanent elongation which is a measure of the elasticity of moulded products, decreases markedly with increasing quantities of diorganopolysiloxane within the range of from 0.5 to 15% by weight.
  • Diorganopolysiloxane additions of 3 to 7% by weight have proved to be particularly advantageous.
  • moulded products of polypropylene and diorganopolysiloxane obtained from the mixtures of the present invention is their improved notched impact strength.
  • the added oligomeric diorganosiloxanes have a cold setting point below -40° C., the dimensional stability under heat, expressed as the Vicat temperature, of moulded products obtained from mixtures of the present invention is only slightly reduced.
  • diorganopolysiloxanes having a viscosity in the range of from 30,000 to 80,000 cSt, determined at 20° C Diorganopolysiloxanes having viscosities below 30,000 cSt are less suitable because they are readily exuded in the course of processing. Very highly viscous diorganopolysiloxanes, with viscosities above 80,000 cSt are also less suitable possible because their rate of diffusion is not sufficient to enable them to be distributed sufficiently rapidly within the polymer workpiece in the event of mechanical stress, e.g. elongation.
  • the present invention therefore provides a homogeneous, thermoplastic mixture comprising
  • (B) from 15-0.5% by weight of liquid, saturated diorganopolysiloxanes having a viscosity of from 30,000 to 80,000 cSt at 20° C.
  • the mixtures are preferably composed of from 93 to 97% by weight of Component A and from 3 to 7% by weight of Component B.
  • the diorganopolysiloxanes used may be dialkylpolysiloxanes having from 1 to 4 C-atoms in each alkyl group, diphenylpolysiloxanes and methyl-phenylpolysiloxane provided they are within the given viscosity range.
  • dialkylpolysiloxanes particularly dimethylpolysiloxanes, are especially effective.
  • the given viscosity range corresponds to a molecular weight average in the range of from ca. 65,000 to 100,000.
  • the average molecular weights of the polyorganosiloxanes suitable for the invention were determined according to Barry's equation (see W. Noll, "Chemie und Technologie der Silicone", 1968, publishers Verlag Chemie GmbH, Weinheim/Bergstr., pages 218/219, Chapter "Kettenpolymere") from the intrinsic viscosities of the oils.
  • the isotactic polypropylene which is suitable for use in the mixtures of the present invention preferably has an isotactic portion of more than 90% by weight and a melt index (MFI) of from 0.1 to 20 g/10 min at 230° C. and under a load of 5 kg according to DIN 53 735 (draft).
  • MFI melt index
  • Relatively high molecular weight polypropylenes having a melt index (MFI) of from 0.1 to 5 g/10 min at 230° C. and under a load of 5 kg have proved to be particularly suitable.
  • Isotactic polypropylene is prepared in known manner by the Ziegler-Natta process, using known catalyst systems such as titanium-III chloride/triethylaluminium or diethylaluminium chloride.
  • the polysiloxanes should be incorporated as homogeneously as possible in the polypropylene.
  • the mixing with polypropylene may be carried out either at room temperature, followed by heating of the mixture under the action of shearing forces, or simply during melting of the polypropylene.
  • the mixing temperature must, however, be high enough to enable the synthetic material to soften completely and form a very uniform mixture.
  • the temperature should generally be from 170° to 270° C. If desired, pigments, fillers, stabilisers, light protective agents or other modifying ingredients may be incorporated with the mixture.
  • FIG. 1 is an illustration of a stretched rod of pure polypropylene.
  • FIG. 2 is an illustration of a stretched rod of a composition of this invention.
  • the diorganopolysiloxane In order to obtain optimally low permanent elongation, the diorganopolysiloxane must be homogeneously distributed in the PP. When elongation tests are carried out on shoulder rods of such optimally produced material, no formation of a neck on the shoulder is observed in the mixture of polypropylene/diorganopolysiloxane, in contrast to pure polypropylene, where formation of a pronounced shoulder neck is observed.
  • the silhouettes of stretched shoulder rods (length 875 mm, thickness 1 mm; after 100% elongation) are illustrated in FIGS. 1 and 2.
  • FIG. 1 represents the silhouette of a stretched shoulder rod of pure propylene and FIG. 2 the silhouette of a stretched shoulder rod formed from a mixture of polypropylene/dimethylpolysiloxane according to Example 2 below.
  • Electronmicroscopic photographs of a cross-section through a sample may be used to determine whether the diorganopolysiloxane is homogeneously distributed in the polypropylene.
  • the mixtures of the present invention show a marked improvement in elastic properties such as permanent elongation and notched impact strength.
  • the mixture of the present invention therefore open up the possibility of producing heat moulded articles having high polyolefine contents, i.e. high dimensional stability in heat and improved elasticity.
  • the polypropylene (PP) used in the mixtures and in comparison Example 1 had an isotactic content of 96% by weight and a melt index of 3.0 g/10 min at 230° C. under a load of 5 kg.
  • the dimethylpolysiloxane had a viscosity of 50,000 cSt at room temperature (20° C.) and a cold setting point of ca. -40° C. Before the mixing operation proper, the dimethylpolysiloxane was vigorously stirred up with the PP powder in the given proportions.
  • the resulting mixture was introduced into a 1 liter internal kneader, model GK 4 SU of Werner & Pfleiderer, Stuttgart, which had been preheated to 170° C., and was vigorously kneaded inside the apparatus for 7 minutes at a speed of 100 revs/min and a ram pressure of 2.5 excess atmospheres. During this operation, the reaction temperature rose to 200°-210° C. The kneaded product was then rolled out into a sheet on a roller (roller temperature ca. 150° C.) and granulated.
  • Test samples according to DIN 53 504, No. 3 (Standard shoulder rod, length 180 mm, thickness 4 mm) were carried out on a digitally controlled injection moulding machine (model ES 110-60) of Engel KG, Schwertberg, Austria, using a screw speed of 130 revs/min, an injection pressure of 1075 bar and a nozzle temperature of 230° C.
  • test samples required for the various tests were removed mechanically from the test sample conforming to DIN 53 504, No. 3.
  • test samples for measuring permanent elongation (Standard shoulder rod: length 75 mm, thickness 1 mm) were punched out of 1 mm thick pressed plates.
  • Examples 1-3 clearly show that the elastic properties such as permanent elongation and notched impact strength improve sharply with increasing dimethyl polysiloxane content, compared with the properties of pure polypropylene (comparison example 1).
  • the flow characteristics (MFI) are effected only at relatively high dimethylpolysiloxane contents (Example 3) whereas the dimensional stability under heat (Vicat softening temperature) is only slightly reduced by the addition of dimethylpolysiloxane.
  • the mixtures of the present invention are therefore particularly suitable for the production of elastic polypropylene based moulded products which are dimensionally stable under heat.
  • Test samples were prepared in the same manner as described in Examples 1 to 3 from polypropylene and dimethylpolysiloxanes having viscosities (at 20° C.) of 25 000 cSt, cold setting point -50° C. and 100 000 cSt, cold setting point -50° C., respectively, and tested as described therein. The results are summarised in Table 2.
  • Comparison Examples 2 and 3 show that moulded products obtained from mixtures of isotactic polypropylene and diorganosiloxanes which are outside the viscosity range required for the mixture of the present invention are substantially inferior in their mechanical properties.

Abstract

A homogeneous, thermoplastic mixture comprising (A) from 85 to 99.5% by weight of isotactic polypropylene; and (B) from 15 to 0.5% by weight of a liquid, saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 cSt at 20° C.
The elastic properties of moulded articles produced from the polypropylene/diorganopolysiloxane mixtures of the present invention are substantially improved by the addition of small quantities of diorganopolysiloxane while their dimensional stability under heat and their rigidity are largely preserved.

Description

The present invention relates to homogeneous, thermoplastic mixtures of isotactic polypropylene and liquid, saturated diorganopolysiloxanes which siloxanes have viscosity within a certain range.
It is known from Belgian Patent No. 648,526 corresponding to U.S. Pat. No. 3,326,880 to mix predominantly crystalline homopolymers or copolymers of monoolefinically unsaturated hydrocarbons having from 2 to 4 carbon atoms, in particular propylene, with 0.01 to 5% by weight, based on the weight of mixtures, of alkali metal salts of branched chain acyclic saturated monocarboxylic acids having not more than 12 C-atoms. Up to 20% by weight, based on the weight of the whole mixture, of rubber-like substances such as silicone rubbers may be incorporated in the molten mixture for further improving the mechanical properties. Such saturated silicone rubbers have molecular weights of from ca. 200,000 to 2,000,000 (see German Auslegeschrift No. 1,669,851, column 4 lines 1-8). According to "Chemie und Technologie der Silicone" by W. Noll, 1968, publishers Verlag Chemie, GmbH, Weinheim/Bergstrasse, page 332, Chapter entitled "Siliconkautschuk-Typen", the usual commercial silicone rubbers are based mainly on polymeric chain dimethylpolysiloxane having molecular weights of from ca. 300,000 to 700,000.
From German Auslegeschrift No. 2,430,949, it is also known that cross-linkable mixtures of polypropylene and a diorganopolysiloxane rubber containing vinyl or allyl groups can be produced with a Williams plasticity above 0.0508 cm (according to ASTM-D-926-67).
Finally, it has been proposed to mix low molecular weight, liquid diorganopolysiloxanes having viscosities of up to 3000 cSt (centistokes) at 25° C. with polyethylene and to mould the mixtures thus obtained by extrusion, optionally with cross-linking. The addition of diorganopolysiloxanes is said to have the desirable effect of preventing the shaped products such as sheets, films, tablets, granules, etc. from sticking or caking together (see U.S. Pat. No. 2,992,201) and of preventing corona discharges when the products are used for electrical purposes (see British Patent Specification No. 1,294,986).
It has now surprisingly been found that liquid saturated diorganopolysiloxane having a viscosity in the range of from 30,000 to 80,000 cSt at 20° C. have a lasting effect on the mechanical properties of isotactic polypropylene even when added in only small quantities. The elastic properties of moulded articles produced from the polypropylene/diorganopolysiloxane mixtures of the present invention are substantially improved by the addition of small quantities of diorganopolysiloxane while their dimensional stability under heat and their rigidity are largely preserved.
The permanent elongation, which is a measure of the elasticity of moulded products, decreases markedly with increasing quantities of diorganopolysiloxane within the range of from 0.5 to 15% by weight. Diorganopolysiloxane additions of 3 to 7% by weight have proved to be particularly advantageous.
Another advantage of the moulded products of polypropylene and diorganopolysiloxane obtained from the mixtures of the present invention is their improved notched impact strength. Although the added oligomeric diorganosiloxanes have a cold setting point below -40° C., the dimensional stability under heat, expressed as the Vicat temperature, of moulded products obtained from mixtures of the present invention is only slightly reduced.
In order to obtain the improvements in properties mentioned above, it is important to use diorganopolysiloxanes having a viscosity in the range of from 30,000 to 80,000 cSt, determined at 20° C. Diorganopolysiloxanes having viscosities below 30,000 cSt are less suitable because they are readily exuded in the course of processing. Very highly viscous diorganopolysiloxanes, with viscosities above 80,000 cSt are also less suitable possible because their rate of diffusion is not sufficient to enable them to be distributed sufficiently rapidly within the polymer workpiece in the event of mechanical stress, e.g. elongation.
The present invention therefore provides a homogeneous, thermoplastic mixture comprising
(A) from 85-99.5% by weight of isotactic polypropylene and
(B) from 15-0.5% by weight of liquid, saturated diorganopolysiloxanes having a viscosity of from 30,000 to 80,000 cSt at 20° C.
The mixtures are preferably composed of from 93 to 97% by weight of Component A and from 3 to 7% by weight of Component B.
The diorganopolysiloxanes used may be dialkylpolysiloxanes having from 1 to 4 C-atoms in each alkyl group, diphenylpolysiloxanes and methyl-phenylpolysiloxane provided they are within the given viscosity range.
The above mentioned dialkylpolysiloxanes particularly dimethylpolysiloxanes, are especially effective.
The given viscosity range corresponds to a molecular weight average in the range of from ca. 65,000 to 100,000.
The average molecular weights of the polyorganosiloxanes suitable for the invention were determined according to Barry's equation (see W. Noll, "Chemie und Technologie der Silicone", 1968, publishers Verlag Chemie GmbH, Weinheim/Bergstr., pages 218/219, Chapter "Kettenpolymere") from the intrinsic viscosities of the oils.
The isotactic polypropylene which is suitable for use in the mixtures of the present invention preferably has an isotactic portion of more than 90% by weight and a melt index (MFI) of from 0.1 to 20 g/10 min at 230° C. and under a load of 5 kg according to DIN 53 735 (draft). Relatively high molecular weight polypropylenes having a melt index (MFI) of from 0.1 to 5 g/10 min at 230° C. and under a load of 5 kg have proved to be particularly suitable.
Isotactic polypropylene is prepared in known manner by the Ziegler-Natta process, using known catalyst systems such as titanium-III chloride/triethylaluminium or diethylaluminium chloride.
In order to achieve optimum utilisation of the elasticising effect of the diorganopolysiloxanes used in the present invention in the polypropylene (PP), the polysiloxanes should be incorporated as homogeneously as possible in the polypropylene. The mixing with polypropylene may be carried out either at room temperature, followed by heating of the mixture under the action of shearing forces, or simply during melting of the polypropylene.
The mixing temperature must, however, be high enough to enable the synthetic material to soften completely and form a very uniform mixture. When mixing is carried out in a kneader or extruder, the temperature should generally be from 170° to 270° C. If desired, pigments, fillers, stabilisers, light protective agents or other modifying ingredients may be incorporated with the mixture.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is an illustration of a stretched rod of pure polypropylene.
FIG. 2 is an illustration of a stretched rod of a composition of this invention.
In order to obtain optimally low permanent elongation, the diorganopolysiloxane must be homogeneously distributed in the PP. When elongation tests are carried out on shoulder rods of such optimally produced material, no formation of a neck on the shoulder is observed in the mixture of polypropylene/diorganopolysiloxane, in contrast to pure polypropylene, where formation of a pronounced shoulder neck is observed. The silhouettes of stretched shoulder rods (length 875 mm, thickness 1 mm; after 100% elongation) are illustrated in FIGS. 1 and 2.
FIG. 1 represents the silhouette of a stretched shoulder rod of pure propylene and FIG. 2 the silhouette of a stretched shoulder rod formed from a mixture of polypropylene/dimethylpolysiloxane according to Example 2 below.
Electronmicroscopic photographs of a cross-section through a sample may be used to determine whether the diorganopolysiloxane is homogeneously distributed in the polypropylene.
Compared with pure polypropylene, the mixtures of the present invention show a marked improvement in elastic properties such as permanent elongation and notched impact strength. The mixture of the present invention therefore open up the possibility of producing heat moulded articles having high polyolefine contents, i.e. high dimensional stability in heat and improved elasticity.
EXAMPLES 1-3 and COMPARISON EXAMPLE 1 (Table 1)
The polypropylene (PP) used in the mixtures and in comparison Example 1 had an isotactic content of 96% by weight and a melt index of 3.0 g/10 min at 230° C. under a load of 5 kg. The dimethylpolysiloxane had a viscosity of 50,000 cSt at room temperature (20° C.) and a cold setting point of ca. -40° C. Before the mixing operation proper, the dimethylpolysiloxane was vigorously stirred up with the PP powder in the given proportions. The resulting mixture was introduced into a 1 liter internal kneader, model GK 4 SU of Werner & Pfleiderer, Stuttgart, which had been preheated to 170° C., and was vigorously kneaded inside the apparatus for 7 minutes at a speed of 100 revs/min and a ram pressure of 2.5 excess atmospheres. During this operation, the reaction temperature rose to 200°-210° C. The kneaded product was then rolled out into a sheet on a roller (roller temperature ca. 150° C.) and granulated.
Test samples according to DIN 53 504, No. 3 (Standard shoulder rod, length 180 mm, thickness 4 mm) were carried out on a digitally controlled injection moulding machine (model ES 110-60) of Engel KG, Schwertberg, Austria, using a screw speed of 130 revs/min, an injection pressure of 1075 bar and a nozzle temperature of 230° C.
The test samples required for the various tests were removed mechanically from the test sample conforming to DIN 53 504, No. 3.
The test samples for measuring permanent elongation (Standard shoulder rod: length 75 mm, thickness 1 mm) were punched out of 1 mm thick pressed plates.
The results of the tests obtained in the individual Examples are summarised in Table 1.
Examples 1-3 clearly show that the elastic properties such as permanent elongation and notched impact strength improve sharply with increasing dimethyl polysiloxane content, compared with the properties of pure polypropylene (comparison example 1). The flow characteristics (MFI) are effected only at relatively high dimethylpolysiloxane contents (Example 3) whereas the dimensional stability under heat (Vicat softening temperature) is only slightly reduced by the addition of dimethylpolysiloxane.
The mixtures of the present invention are therefore particularly suitable for the production of elastic polypropylene based moulded products which are dimensionally stable under heat.
              TABLE 1                                                     
______________________________________                                    
                                     Compar-                              
          Measuring                  ison                                 
          unit    Ex. 1  Ex. 2  Ex. 3                                     
                                     Example 1                            
______________________________________                                    
Polypropylene                                                             
            parts by  97.5   95    90  100                                
            weight                                                        
Dimethylpoly-                                                             
            parts by  2.5    5.0  10.0 --                                 
siloxane    weight                                                        
Melt index.sup.1                                                          
            g/10 min  3.3    3.6  10.2 3.0                                
MFI (230° C./5kg)                                                  
Permanent                                                                 
elongation.sup.2                                                          
              %        65    53   57    89                                
Vicat soften-                                                             
ing temper-                                                               
ature.sup.3   °C.                                                  
                      150    147  144  154                                
Notched impact                                                            
strength.sup.4                                                            
(23° C.)                                                           
            kJ/m.sup.2                                                    
                      7.6    8.3   7.5 5.0                                
______________________________________                                    
 .sup.1 according to DIN 53753?                                           
 .sup.2 Method of measuring: Elongation of a standard shoulder rod (length
 75 mm, thickness 1mm) to twice its length (100% elongation) at the rate o
 10 mm/min; immediate removal of load, permanent elongation measured at   
 zero tension.                                                            
 .sup.3 according to DIN 53460                                            
 .sup.4 according to DIN 53453                                            
EXAMPLE 2 and COMPARISON EXAMPLES 2 and 3 (Table 2)
Test samples were prepared in the same manner as described in Examples 1 to 3 from polypropylene and dimethylpolysiloxanes having viscosities (at 20° C.) of 25 000 cSt, cold setting point -50° C. and 100 000 cSt, cold setting point -50° C., respectively, and tested as described therein. The results are summarised in Table 2.
Comparison Examples 2 and 3 show that moulded products obtained from mixtures of isotactic polypropylene and diorganosiloxanes which are outside the viscosity range required for the mixture of the present invention are substantially inferior in their mechanical properties.
              TABLE 2                                                     
______________________________________                                    
        Measuring         Compari- Compari-                               
        unit    Ex.2      son Ex.2 son Ex.3                               
______________________________________                                    
Polypropylene                                                             
          parts by  95        95     95                                   
          weight                                                          
Dimethylpoly-                                                             
          parts by   5         5      5                                   
siloxane  weight                                                          
Viscosity of                                                              
          cSt at    50000     25000  100000                               
the dimethyl-                                                             
polysiloxane                                                              
Melt index.sup.1                                                          
          g/10 min. 3.6       4.5    3.5                                  
MFI (230° C./5                                                     
kg)                                                                       
Permanent   %       53        68     64                                   
elongation.sup.2                                                          
Vicat soften-                                                             
            °C.                                                    
                    147       145    146                                  
ing point                                                                 
temperature.sup.3                                                         
Notched impact                                                            
          kJ/m.sup.2                                                      
                    8.3       6.9    7.4                                  
strength.sup.4                                                            
(23° C.)                                                           
______________________________________                                    
 .sup.1 see Table 1                                                       
 .sup.2 see Table 1                                                       
 .sup.3 see Table 1                                                       
 .sup.4 see Table 1                                                       

Claims (7)

We claim:
1. A homogeneous thermoplastic mixture comprising
(A) from 85 to 99.5% by weight of isotactic polypropylene having an isotactic portion of more than 90% by weight and a melt index of from 0.1 to 20 g/10 min at 230° C. under a load of 5 kg; and
(B) from 15 to 0.5% by weight of a liquid, saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 cSt at 20° C.
2. A homogeneous thermoplastic mixture as claimed in claim 1 wherein component (A) is present in an amount of from 93 to 97% by weight and component (B) is present in an amount of from 3 to 7% by weight.
3. A homogeneous thermoplastic mixture as claimed in claim 1 wherein the isotactic polypropylene has a melt index of from 0.1 to 5 g/10 min at 230° C. and under a load of 5 kg.
4. A homogeneous thermoplastic mixture as claimed in claim 1 wherein the diorganopolysiloxane is a dialkylpolysiloxane having from 1 to 4 carbon atoms in each alkyl group.
5. A homogeneous thermoplastic mixture as claimed in claim 4 wherein the dialkylpolysiloxane is a dimethylpolysiloxane.
6. A homogeneous thermoplastic mixture as claimed in claim 1 wherein the diorganopolysiloxane is a methyl-phenylpolysiloxane.
7. Heat moulded articles prepared from a homogeneous thermoplastic mixture as claimed in claim 1.
US06/119,940 1979-02-13 1980-02-08 Mixtures of polypropylene and liquid saturated diorganopolysiloxanes Expired - Lifetime US4287108A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792905357 DE2905357A1 (en) 1979-02-13 1979-02-13 MIXTURES OF POLYPROPYLENE AND LIQUID, SATURATED DIORGANOPOLYSILOXANES
DE2905357 1979-02-13

Publications (1)

Publication Number Publication Date
US4287108A true US4287108A (en) 1981-09-01

Family

ID=6062778

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/119,940 Expired - Lifetime US4287108A (en) 1979-02-13 1980-02-08 Mixtures of polypropylene and liquid saturated diorganopolysiloxanes

Country Status (4)

Country Link
US (1) US4287108A (en)
EP (1) EP0014872B1 (en)
JP (1) JPS55110142A (en)
DE (2) DE2905357A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002751A1 (en) * 1982-02-04 1983-08-18 Gen Electric Silicone flame retardants for plastics
US4472556A (en) * 1982-12-20 1984-09-18 Dow Corning Corporation Method for enhancing one or more mechanical properties of partially crystalline thermoplastics
US4588775A (en) * 1984-06-22 1986-05-13 Shell Oil Company High toughness propylene polymer compositions
US4708983A (en) * 1986-06-18 1987-11-24 Phillips Petroleum Company Arylene sulfide polymers of improved impact strength
US4769418A (en) * 1986-03-17 1988-09-06 Mitsubishi Petrochemical Co., Ltd. Propylene polymer film
US5478880A (en) * 1994-02-01 1995-12-26 Moore Business Forms, Inc. Printable release
US5488081A (en) * 1993-11-04 1996-01-30 Lord Corporation Highly damped organic elastomer composition
US5702827A (en) * 1993-07-08 1997-12-30 Mitsui Petrochemical Industries, Ltd. Olefin thermoplastic elastomer and laminate thereof
US5738745A (en) * 1995-11-27 1998-04-14 Kimberly-Clark Worldwide, Inc. Method of improving the photostability of polypropylene compositions
US5744548A (en) * 1994-10-12 1998-04-28 Kimberly-Clark Worldwide, Inc. Melt-extrudable thermoplastic polypropylene composition and nonwoven web prepared therefrom
US20060002814A1 (en) * 2004-07-02 2006-01-05 Gautam Chatterjee Methods of sterilizing polycarbonate articles and methods of manufacture

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3240338C1 (en) * 1982-10-30 1989-08-10 Dynamit Nobel Ag, 5210 Troisdorf Process for the production of films from polypropylene by calendering
US4535113A (en) * 1984-03-13 1985-08-13 Union Carbide Corporation Olefin polymer compositions containing silicone additives and the use thereof in the production of film material
US4560712A (en) * 1984-12-27 1985-12-24 Mobil Oil Company Polypropylene compositions containing bimodal calcium carbonate and a polysiloxane
DE3502680C2 (en) * 1985-01-26 1997-03-06 Akzo Nobel Nv Process for the preparation of a polyolefin additive concentrate and its use
JP4889136B2 (en) * 1999-12-09 2012-03-07 株式会社プライムポリマー Propylene resin composition

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655489A (en) * 1951-09-19 1953-10-13 Du Pont Coating compositions comprising polyethylene and alkyl polysiloxane and method of making same
US2888419A (en) * 1955-12-05 1959-05-26 Gen Electric Polyethylene composition containing organopolysiloxane resin
GB843665A (en) * 1956-10-18 1960-08-10 Phillips Petroleum Co Blends of silicone rubber and crystalline ethylene polymer and method for productionthereof
US2992201A (en) * 1958-04-09 1961-07-11 Eastman Kodak Co Extrusion composition consisting of polyethylene and liquid dimethyl polysiloxanes
CA639930A (en) * 1962-04-17 K. Schramm Charles Low pressure polypropylene-silicone gum blends
US3326880A (en) * 1963-05-30 1967-06-20 Shell Oil Co Polymer crystallization
GB1224035A (en) 1967-07-05 1971-03-03 Huels Chemische Werke Ag Thermoplastic moulding materials
GB1294986A (en) 1970-01-05 1972-11-01
US3865897A (en) * 1973-08-03 1975-02-11 Dow Corning Method of blending polyolefins and polydiorganosiloxane gums and blends thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL233461A (en) * 1957-12-02

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA639930A (en) * 1962-04-17 K. Schramm Charles Low pressure polypropylene-silicone gum blends
US2655489A (en) * 1951-09-19 1953-10-13 Du Pont Coating compositions comprising polyethylene and alkyl polysiloxane and method of making same
US2888419A (en) * 1955-12-05 1959-05-26 Gen Electric Polyethylene composition containing organopolysiloxane resin
GB843665A (en) * 1956-10-18 1960-08-10 Phillips Petroleum Co Blends of silicone rubber and crystalline ethylene polymer and method for productionthereof
US2992201A (en) * 1958-04-09 1961-07-11 Eastman Kodak Co Extrusion composition consisting of polyethylene and liquid dimethyl polysiloxanes
US3326880A (en) * 1963-05-30 1967-06-20 Shell Oil Co Polymer crystallization
GB1224035A (en) 1967-07-05 1971-03-03 Huels Chemische Werke Ag Thermoplastic moulding materials
GB1294986A (en) 1970-01-05 1972-11-01
US3865897A (en) * 1973-08-03 1975-02-11 Dow Corning Method of blending polyolefins and polydiorganosiloxane gums and blends thereof

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
Derwent Abs. 12230B/07, (DT 2821807), "Flame-resist Insulating Comp. . . . Polyolefin Together with Organo Polysiloxane Rubber . . . ", Aug. 2, 1979. *
Derwent Abs. 14704V/08, "Plastics/Rubber Electrical Insul. Mat. Contg. an Organosiloxane . . . ", (J7-4004-815), Feb. 4, 1974. *
Derwent Abs. 32376Y/18, (SU 521293), "Vulcanizing Nonpolar Rubber Comp. . . . and Liquid Polymethyl or Polyethylsiloxane . . . ", Oct. 19, 1976. *
Derwent Abs. 41756A/23, (SU 565922), Aug. 25, 1977, "Heat Stable . . . Ethylene-Propylene Copolymer . . . and Liq. Poly:ethylene:siloxane". *
Derwent Abst., "Electric Insulator . . . ", (DT 2217795), Oct. 19, 1972, Celanese Corp. *
Derwent Abst., "Mould for Concrete Construction . . . Polypropylene", (J78001-768), Jan. 21, 1978. *
Derwent Abst., (J48028-542), Apr. 16, 1973, "Liquid Repellent Thermoplastic Mouldings-Contg. Silicone Polym. & Polypropylene . . . ". *
Derwent Abst., 65188W/39, "Polypropylene Compsn.-Cont. Poly-dimethyl Siloxane Rubber as Elastomer to Improve Properties", (SU 455124), 3-13-75. *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002751A1 (en) * 1982-02-04 1983-08-18 Gen Electric Silicone flame retardants for plastics
US4472556A (en) * 1982-12-20 1984-09-18 Dow Corning Corporation Method for enhancing one or more mechanical properties of partially crystalline thermoplastics
US4588775A (en) * 1984-06-22 1986-05-13 Shell Oil Company High toughness propylene polymer compositions
US4769418A (en) * 1986-03-17 1988-09-06 Mitsubishi Petrochemical Co., Ltd. Propylene polymer film
US4708983A (en) * 1986-06-18 1987-11-24 Phillips Petroleum Company Arylene sulfide polymers of improved impact strength
US5702827A (en) * 1993-07-08 1997-12-30 Mitsui Petrochemical Industries, Ltd. Olefin thermoplastic elastomer and laminate thereof
US5488081A (en) * 1993-11-04 1996-01-30 Lord Corporation Highly damped organic elastomer composition
US5621030A (en) * 1994-02-01 1997-04-15 Moore Business Forms, Inc. Printable release
US5543192A (en) * 1994-02-01 1996-08-06 Moore Business Forms, Inc. Printable release
US5478880A (en) * 1994-02-01 1995-12-26 Moore Business Forms, Inc. Printable release
US5874499A (en) * 1994-02-01 1999-02-23 Moore Business Forms, Inc. Printable release
US5985982A (en) * 1994-02-01 1999-11-16 Moore Business Forms, Inc. Printable release
US5744548A (en) * 1994-10-12 1998-04-28 Kimberly-Clark Worldwide, Inc. Melt-extrudable thermoplastic polypropylene composition and nonwoven web prepared therefrom
US5738745A (en) * 1995-11-27 1998-04-14 Kimberly-Clark Worldwide, Inc. Method of improving the photostability of polypropylene compositions
US20060002814A1 (en) * 2004-07-02 2006-01-05 Gautam Chatterjee Methods of sterilizing polycarbonate articles and methods of manufacture
US7638091B2 (en) 2004-07-02 2009-12-29 Sabic Innovative Plastics Ip B. V. Methods of sterilizing polycarbonate articles and methods of manufacture

Also Published As

Publication number Publication date
EP0014872A1 (en) 1980-09-03
DE3060564D1 (en) 1982-08-12
DE2905357A1 (en) 1980-08-21
JPS55110142A (en) 1980-08-25
EP0014872B1 (en) 1982-06-23

Similar Documents

Publication Publication Date Title
US4287108A (en) Mixtures of polypropylene and liquid saturated diorganopolysiloxanes
US4292222A (en) Homogeneous thermoplastic mixtures of propylene-ethylene copolymers and liquid, saturated diorganopolysiloxanes within a certain viscosity range
EP0632098B1 (en) Organosilicon resinous compositions as extrusion lubricants
US4321336A (en) High impact polyamide blends
US2888419A (en) Polyethylene composition containing organopolysiloxane resin
US3865897A (en) Method of blending polyolefins and polydiorganosiloxane gums and blends thereof
KR920001566B1 (en) Ther moplastic resin composition
DE69822057T2 (en) Highly consistent elastomer for handling liquids
JPS6411061B2 (en)
DE2422846B2 (en) PROCESS FOR THE PRODUCTION OF ORGANOPOLYSILOXANE COMPOUNDS
CA1137670A (en) Abs-polymers of high notched impact strength
PL285727A1 (en) Polymeric mixture, method of making thermoplastic products and method of obtainng a thermoplastic melt
JPH0514742B2 (en)
JPH0395239A (en) Polymer-base blend composition containing modified starch
US3261885A (en) Production of block-graft copolymers from polyolefines and synthetic polyamides
JPS59140244A (en) Elastomer, polypropylene blend for optically transparent products
JPH06509378A (en) Scratch resistant polymer compositions and products
US3696068A (en) Organosiloxane elastomers
US3449290A (en) Silicone elastomer compositions containing powdered polytetrafluoroethylene
US3637544A (en) Vulcanized elastomeric blends containing a cyclic ester polymer
EP0265779B1 (en) Improved silicone extrusion stock
CA1124980A (en) Method of blending ethylene vinylacetate copolymers and polydiorganosiloxane gums and the blends made by the method
US3504051A (en) Castable siloxane block copolymers
US3234175A (en) Siloxane compositions and elastomers prepared therefrom
USRE25141E (en) Low shrinkage silicone rubber composi-

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED CASE